bead tree vs nim

bead tree

noun
  • Melia azedarach, a deciduous or semi-evergreen tree with poisonous fruit, native to India, Southeast Asia, and northern Australia. 

nim

noun
  • A game in which players take turns removing objects from heaps. 

verb
  • To walk with short, quick strides; trip along. 

How often have the words bead tree and nim occurred in a corpus of books? (source: Google Ngram Viewer )